Which of these is a 32 amino acid water soluble peptide hormone?
A
Gastrin
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B
Insulin
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C
Glucagon
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D
Calcitonin
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Solution
The correct option is D Calcitonin Calcitonin is the polypeptide hormone which is made up of 32 amino acids. It is produced by the parafollicular cells of the thyroid gland. Its main function is to lower the calcium level in the blood by increased re-absorption of calcium in bone and reduced re-absorption of calcium in kidneys.